Tissue handling system with reduced operator exposure

ABSTRACT

A tissue handling system includes a biopsy device and a tissue storage container separate from the biopsy device. The biopsy device has a cutting cannula, a housing, and a tissue collecting device. The tissue collecting device is detachably received in the housing. The tissue collecting device is configured to receive at least one tissue sample. The tissue storage container is configured to detachably receive the tissue collecting device after the tissue collecting device is disengaged from the housing of the biopsy device to deliver the at least one tissue sample from the tissue collecting device to the tissue storage container.

PRIORITY DATA AND INCORPORATION BY REFERENCE

This application is a continuation of U.S. patent application Ser. No.15/407,302 filed Jan. 17, 2017, now U.S. Pat. No. 10,172,594, which is acontinuation of U.S. patent application Ser. No. 14/514,660, filed Oct.15, 2014, now U.S. Pat. No. 9,566,045, which is a continuation of U.S.patent application Ser. No. 13/931,116, filed Jun. 28, 2013, nowabandoned, which is a continuation of U.S. patent application Ser. No.12/444,084, filed Nov. 25, 2009, now U.S. Pat. No. 8,485,987, which is aU.S. national phase of International Application No. PCT/EP2007/060615,filed Oct. 5, 2007, which claims priority to U.S. ProvisionalApplication Ser. No. 60/850,004, filed Oct. 6, 2006, each of which ishereby incorporated by reference in its entirety.

FIELD OF THE INVENTION

This invention relates to systems for the acquisition and handling oftissue samples and, more particularly, to a system that comprises allnecessary means for harvesting, storing and transporting tissue sampleswithout requiring physical handling of the tissue sample by theoperator, in an uninterrupted chain that has its point of origin withinthe body of the patient and has as its point of conclusion thecommencement of analysis of the at least one sample by a pathologist orsimilarly medical skilled professional. More specifically, the inventionrelates to a system for the acquisition and handling of tissue samplesthat comprises all necessary means for harvesting, storing andtransporting the at least one tissue sample without requiring physicalhandling of the sample by the operator, in an uninterrupted tissuehandling chain that has its point of origin within the body of thepatient and has as its point of conclusion the commencement of analysisof the at least one tissue sample by a pathologist or similarly skilledprofessional, while at the same time protecting the operator and otherpersons involved in the handling of tissue samples from exposure topotential bio-hazards and bio-contaminants as well as formalin orsimilar preserving agents that may act as carcinogens.

BACKGROUND OF THE INVENTION

In modern medicine it is often desirable and frequently necessary toharvest tissue samples from a target tissue region or tissue site insidea human or animal body for the purpose of diagnosing a suspectedmalignancy. Currently available biopsy devices offer several ways ofaccessing suspect tissue and of harvesting tissue samples that may beused for diagnostic purposes, and some also comprise temporary storagesolutions that may be used to hold tissue samples during a biopsyprocedure. Such a biopsy device is disclosed in U.S. Pat. No. 5,526,822.The disclosed biopsy device is capable of harvesting multiple tissuesamples in a single device insertion and features a cassette withmultiple tissue chambers, permitting the temporary storage of multipletissue samples.

However, none of the currently available biopsy devices and systemsaddress all the functions and provide all the interfaces betweenfunctions that are involved in harvesting a tissue sample and gettingthe tissue sample to the pathologist in uncontaminated or undisturbedcondition. Another important aspect of the present invention is toprovide biopsy devices and systems that minimize operator exposure tobio-hazards, bio-contaminants as well as formalin and other known andprobable human carcinogens. The current lack of commercially availablebiopsy devices and systems with one or both of these capabilities isproblematic for several reasons.

New and improved diagnostic techniques—such as cytogenetic,immunological and biochemical analyses require that the tissue samplesbe handled with extreme care. Since tissue architecture is an importantparameter in the histologic analysis of samples it is important thathandling of acquired tissue samples is minimized.

Human tissues are potentially infectious, and an operator increases hisexposure to such infection by physically handling tissue samples. Giventhis, limiting operator exposure to tissue samples is a sensibleprecaution. Currently available systems, such as is disclosed in U.S.Pat. No. 5,526,822, provide means for temporarily storing one or moretissue samples during a biopsy procedure, but no means are provided fortransferring such tissue samples to more permanent storage containerswhere preservation and fixation of the tissue samples is possible. Inuse, these systems therefore require that the operator or an assistantmanually transfer samples from the temporary storage means included inthe biopsy device to more permanent storage means if said samples are tobe fixated prior to being sent to a pathologist or similarly skilledindividual for analysis.

Another problem that has received little attention in the design ofpresently available biopsy systems is the use of formalin or similarpreserving agents to fixate tissue samples subsequent to theirextraction from the patient. Formalin is classified by the WHO and IARCas a known carcinogen and at least some countries have imposed limits onthe permissible exposure. These limits include upper limits on theamount of airborne formalin and such upper limits have forced somehospitals to implement ventilation and suction systems to protectdoctors and assistants from excessive exposure to formalin. Suchimplementation programs—when possible—are costly and potentiallydisruptive to established biopsy procedure routines.

Therefore, a biopsy device and system according to the present inventionthat comprise all necessary components and functionalities for safelyand efficiently harvesting one or more tissue samples in a single deviceinsertion are highly advantageous. Furthermore, such biopsy device andsystem may advantageously comprise means for temporarily storingharvested tissue samples in individual compartments during the biopsyprocedure while permitting the operator/doctor to inspect each tissuesample for adequacy, as well as means for more permanently storing andfixating the samples once the harvesting is over. Ideally, transfer ofthe tissue samples between the temporary storage means included in thebiopsy device and the permanent storage means should be possible withoutrequiring that the operator removes the samples from their individualcompartments thereby minimizing the exposure of the operator tobio-hazards and bio-contamination. In addition, such a comprehensivebiopsy device and system would also provide means for aggregatingformalin or a similar preserving and fixating agent while maintaining atall times a closed environment, to eliminate operator exposure to suchsubstances.

SUMMARY OF THE INVENTION

In a first aspect, the present invention provides a tissue handlingsystem comprising:

-   -   a biopsy device having an invasive unit with tissue-receiving        and tissue-severing components being capable of harvesting and        bringing at least one tissue sample to a point outside the body        of a patient;    -   a tissue collecting device adapted to be brought in detachable        operative engagement with the tissue-receiving components of the        biopsy device to remove the at least one tissue sample;    -   a tissue storage container configured to receive the at least        one tissue sample, the entire tissue collecting device, or the        part of the collecting device that contains the at least one        tissue sample, the tissue storage container further being        configured to receive a volume of preserving agent; and    -   a vessel adapted to contain the preserving agent adapted to be        gas-tightly mated or coupled to the tissue storage container.

Preferably, structure is provided for transferring (i.e. conveying ormoving) the preserving agent in the vessel to the tissue storagecontainer. As the tissue collecting device may be detached from theremaining components of the biopsy device and placed in the tissuestorage container, which in turn may be partially or fully filled withthe preserving agent deriving from the vessel, a convenient way oftransferring tissue samples from the biopsy device to a storagecontainer is provided.

A compartment in the vessel for storing the preserving agent may beclosed by a liquid and gas tight closure, which is releasable when thevessel is mated or coupled to the tissue storage container. In oneembodiment, preserving agent may be released following a predefined useraction, such as removal of a separate seal or closure or activation of asyringe plunger. In other embodiments, release of the closure to conveypreserving agent from the vessel may occur automatically as aconsequence of attachment of the vessel to the tissue storage container.For example, the tissue storage container and the vessel may comprise aconnecting structure for gas-tightly mating or coupling the vessel tothe tissue storage container. Hence, the connecting structure may bearranged to cause the closure to be released as a consequence of matingor coupling the vessel to the tissue storage container.

The vessel may be comprised in a lid for closing the tissue storagecontainer. In one embodiment, the lid is attachable to the tissuestorage container in such a way that a first attachment actionestablishes a gas tight coupling of the vessel to the tissue storagecontainer, and a second attachment action causes release of the closure.The tissue storage container and the lid are preferably arranged suchthat the second attachment action cannot occur prior to the firstattachment action. The first attachment action may e.g. include an axialdisplacement of the parts relative to each other, whereas the secondattachment action may e.g. include a mutual twisting of the parts. Theparts may be shaped and configured such that the twisting, which causesrelease of the closure cannot occur, before the parts are arranged inthe correct axial inter-relationship. Preferably, the closure may beresealed following a third predefined user action, such as e.g. afurther mutual twisting of the parts, to prevent the preserving agentfrom flowing back from the tissue storage container into the vessel.

In other embodiments, the vessel may include a syringe, and the tissuestorage container may comprise a connecting mechanism for gas-tightlymating or coupling the syringe to the tissue storage container, such asa luer lock or a septum.

The collecting device of the biopsy device may comprise a collectingunit which comprises a plurality of individual tissue chambers, andwherein the collecting device is capable of sequentially removing, fromthe tissue-receiving components of the biopsy device, a plurality ofindividual tissue samples as they are excised from the body of thepatient and of temporarily storing the tissue samples in individualtissue chambers. Alternatively, the tissue samples may be temporarilystored in one single bulk in said chamber.

Suitable devices for harvesting and temporarily storing tissue samplesare disclosed in International Patent Application No. PCT/DK2007/000166,which is hereby incorporated by reference.

The volume of preserving agent in the vessel is preferably sufficient tocover the at least one tissue sample when stored in the tissue storagecontainer.

In a second aspect, the present invention provides a method of handlingat least one harvested biopsy tissue sample, the method comprising:

-   -   providing the at least one tissue sample in tissue-receiving        components of a biopsy device outside the body of a patient;    -   detachably engaging a tissue collecting device to said        tissue-receiving components;    -   arranging the at least one tissue sample, the entire tissue        collecting device, or the part of the collecting device that        contains the at least one tissue sample in a tissue storage        container;    -   gas-tightly mating or coupling a vessel containing a volume of a        preserving agent to the tissue storage container;    -   transferring the volume of preserving agent from the vessel to        the tissue storage container, when the vessel is gas-tightly        mated or coupled to the tissue storage container.

The features of the system of the first aspect of the invention andtheir intended method of use may be incorporated in embodiments of themethod of the second aspect of the invention.

It will hence be understood that the vessel may include a compartmentfor storing the preserving agent, wherein the compartment is closed by aliquid and gas tight closure, and wherein the closure is released from aclosed condition to an open condition, when the vessel is mated orcoupled to the tissue storage container. The closure may be caused to bereleased as a consequence of mating or coupling the vessel to the tissuestorage container. The vessel may be comprised in a lid for closing thetissue storage container, and the lid may be attached to the tissuestorage container in such a way that a first attachment actionestablishes a gas tight coupling of the vessel to the tissue storagecontainer, and a second subsequent attachment action causes release ofsaid closure. A third subsequent action may cause closing of the closureto prevent preserving agent from flowing back from the tissue storagecontainer to the vessel.

The method may further comprise, subsequently to the step oftransferring, the further step of conveying the tissue storage containerwith the at least one tissue sample container therein from a firsthandling site to a second handling site, when the tissue samplecontainer is closed by said lid. The first handling site may e.g. beprovided close to the patient, e.g. on a working desk of the surgeonperforming the biopsy procedure, and the second handling site may e.g.be provided at a remote location, such as the analysis site of thepathologist.

In a third aspect, the invention provides a system for storing at leastone harvested biopsy tissue sample, the system comprising:

-   -   a tissue storage container capable of receiving and storing the        at least one tissue sample;    -   a vessel containing a volume of a preserving agent;    -   a connecting structure for gas-tightly mating or coupling the        vessel to the tissue storage container;    -   a fluid transferring mechanism for causing a transfer of the        volume of preserving agent from the vessel to the tissue storage        container, when the vessel is gas-tightly mated or coupled to        the tissue storage container.

The features of the system of the first aspect of the invention and themethod of the second aspect of the invention also apply to the system ofthe third aspect of the invention. It will hence be appreciated that thevessel may have a compartment for storing the preserving agent, whereinthe compartment is closed by a liquid and gas tight closure, the closurebeing releasable when the vessel is mated or coupled to the tissuestorage container. The tissue storage container and the vessel maycomprise a connecting structure for gas-tightly mating or coupling thevessel to the tissue storage container, and the connecting structure maybe arranged to cause the closure to be released as a consequence ofmating or coupling the vessel to the tissue storage container. Thevessel may be comprised in a lid for closing the tissue storagecontainer. The lid may be attachable to the tissue storage container insuch a way that a first attachment action establishes a gas tightcoupling of the vessel to the tissue storage container, and a secondattachment action causes release of said closure, the tissue storagecontainer and the lid being arranged such that the second attachmentaction cannot occur prior to the first attachment action. A thirdsubsequent action may cause closing of the closure to prevent preservingagent from flowing back from the tissue storage container to the vessel.

The vessel may include a syringe, and the tissue storage container maycomprise a connecting mechanism for gas-tightly mating or coupling thesyringe to the tissue storage container.

The vessel may be adapted to contain a volume of preserving agent, whichis sufficient to cover the at least one tissue sample when stored in thetissue storage container.

It will be appreciated that the system of the third aspect of theinvention may be used to cause the transfer of any matter into any kindof container. Hence, the system of the third aspect of the invention maybe for storing any kind of material with any kind of liquid or gas, orfor mixing two components, such as two kinds of liquid, two kinds ofpowders, or for mixing liquid into solid matter or powder.

In a fourth aspect, the present invention provides a vessel for a systemaccording to the third aspect of the invention, said system comprising atissue storage container capable of receiving and storing at least onetissue sample, the vessel comprising:

-   -   a cavity containing a volume of a tissue preserving agent;    -   connecting elements for gas-tightly mating or coupling the        vessel to the tissue storage container;    -   fluid transferring element for causing a transfer of the volume        of preserving agent from the vessel to the tissue storage        container, when the vessel is gas-tightly mated or coupled to        the tissue storage container.

The vessel may include the features described above with reference tothe systems of the first and third aspects of the invention as well asthe features described above with reference to the method of the secondaspect of the invention.

The vessel may hence comprise a compartment for storing the preservingagent, wherein the compartment is closed by a liquid and gas tightclosure, said closure being releasable when the vessel is mated orcoupled to the tissue storage container. The vessel may be comprised ina lid for closing the tissue storage container.

From the above description, it will be appreciated that embodiments ofthe various aspects of the present invention provide a comprehensivetissue sampling system that solves the above-mentioned and otherproblems by comprising the following:

A. A biopsy device comprising an invasive unit with tissue-receiving andtissue-severing components that is capable of harvesting and bringing toa point outside the body of a patient one or more tissue samples.

B. A tissue collecting device that may be brought in detachableoperative engagement with the tissue-receiving components of the biopsydevice to remove the at least one tissue sample. Said tissue collectingdevice may optionally comprise one or more tissue chambers for temporarystorage of tissue samples during a biopsy procedure. If more than onechamber is available, said chambers may sequentially move or be movedinto operative engagement with the tissue-receiving components tocollect and individually store tissue samples. By suitable configurationof the tissue collecting device, the sequence and spatial orientation ofthe acquired tissue samples may be maintained at all times and tissuesamples may be supported and protected while they are temporarily heldin the tissue collecting device.

C. A tissue storage container that is configured receive either the oneor more tissue samples, the entire tissue collecting device or the partof the collecting device that contains the one or more tissue samples.The tissue storage container is furthermore configured to receive avolume of preserving agent while comprising a sealed receptacle thatprovides a substantially sealed enclosure for the gaseous and liquidphases of the preserving agent.

D. A vessel containing the preserving agent that may be gas-tightlymated or coupled to the tissue storage container and inject thepreserving agent into the tissue storage container. Said vessel shouldpreferably contain an amount of preserving agent that is sufficient tocover the at least one tissue sample that is housed in the tissuestorage container.

In a particular embodiment, the invention provides a comprehensivetissue sampling system comprising:

A. A multiple biopsy device comprising an invasive unit withtissue-receiving and tissue-severing components that is capable ofharvesting and bringing to a point outside the body of a patient aplurality of individual tissue samples in a single device insertion.

B. An automatic tissue collecting device that is in detachable operativeengagement with the multiple biopsy device. Said tissue collectingdevice comprises a housing and a collecting unit that comprises aplurality of individual tissue chambers and is held in the housing bymeans of a collecting unit lid that is releasably attached to thehousing. Said tissue collecting device is capable of sequentiallyremoving from the tissue-receiving components of the biopsy device aplurality of individual tissue samples as they are excised from the bodyof the patient and of temporarily storing these tissue samples inindividual tissue chambers while maintaining at all times the spatialorientation of said samples relative to their positions at the point ofsampling. Following completion of a biopsy procedure, the tissuecollecting device may be detached from the biopsy device and thecollecting unit along with the lid may be removed from the housing andtransferred to a tissue storage container while still containing thesamples. Thus, physical manipulation of individual samples is avoided.

C. A tissue storage container that is configured to receive thecollecting unit of the tissue collecting device and to house saidcollecting unit along with the samples that are stored in the tissuechambers of the collecting unit. The tissue storage container comprisesa receptacle that may be air-tightly mated to a tissue storage containerlid and is configured to receive and support the collecting unit. Thecapacity of the receptacle is dimensioned to ensure that sufficientpreserving agent is available to provide proper fixation of theindividual samples. The tissue storage container lid may be configuredto mate with the lid of the collecting unit, permitting the operator toremove the collecting unit from the housing by holding the tissuestorage container lid and the housing, thus avoiding physicalmanipulation of individual tissue samples. Furthermore, the tissuestorage container lid may be configured to act as a reservoir for apreserving agent and comprises a fully enclosed cavity as well as meansfor gas-tight mating or coupling to a vessel containing a preservingagent. Suitable configuration of said vessel will provide gas-tightingress and subsequent controlled egress of said preserving agent intothe receptacle. Such means of controlled egress may be configured toprovide a user-activated gas- and fluid-tight seal between the storagecontainer lid and the receptacle. Such a seal may be activatedsubsequent to the egress of the preserving agent from the tissue storagecontainer lid, efficiently limiting the volume of preserving agentneeded to adequately cover the samples by keeping the preserving agentcontained in the receptacle. Thus, if the amount of preserving agentapplied prior to activation matches the capacity of the receptacle, andif the tissue storage container is suitably oriented during egress, itis ensured that the samples will be adequately covered while they arekept in the tissue storage container. If the means of ingress arefurthermore configured to act as a gas-tight seal following removal ofthe vessel, substantially all the air and vapors of preserving agentthat is contained in the storage container lid subsequent to the egressof said agent may be encapsulated in said lid. Thus, if ingress andsubsequent egress of the agent is done subsequent to attachment of thetissue storage container lid to the receptacle, the lid may act as anair lock, permitting the ingress of the preserving agent into the tissuestorage container while at the same time preventing vapors of said agentfrom escaping from said container to the surrounding environment. Bysuitable configuration of the user-activated seal, the air andpreserving agent that is thus contained may remain encapsulated in thetissue storage container lid even after the lid is removed from thereceptacle.

D. A vessel containing formalin or similar preserving agent that isconfigured as a syringe and may be detachably and air-tightly mated tothe ingress means of the lid of the tissue storage container. Saidsyringe may comprise means for injecting the formalin at a pressureexceeding the atmospheric pressure. This capability is desired sinceinjection of the preserving agent is done into a gas-tightly sealedcontainer that is filled with air at atmospheric pressure prior toinjection. As the preserving agent is injected into the storagecontainer, the air in said container is compressed in correspondencewith the volume of preserving agent injected. If the tissue storagecontainer is placed with the receptacle in a lower position relative tothe tissue storage container lid during injection, and the preservingagent is in a fluid phase, the laws of gravity will cause the preservingagent to move towards the bottom of the receptacle while the air thatfills the container will be urged toward the top of the lid. If thecapacity of the tissue storage container lid is sufficient or the amountof preserving agent is minimal compared with the amount of air, theoperator should have to expend an absolute minimum of force whileinjecting the preserving agent. Alternatively, suitably configured toolsmay be provided to assist the operator.

An important advantage of the comprehensive biopsy system according topreferred embodiments of the invention is that it provides extensiveprotection of the operator from liquid or gaseous components ofpotentially toxic and/or carcinogenic preserving agents by maintainingfor the duration of the procedure all such agents in gas-tightenclosures. As an additional benefit associated with preferredembodiments of such a system, the operator is provided with means oftransferring one or more tissue samples from a biopsy device to apreserving agent without having to physically manipulate individualtissue samples. Thus, operator exposure to bio-hazards andbio-contaminants is to a large extent avoided.

According to one embodiment, the ingress means for the preserving agentcomprise a female luer lock that is operatively connected to a one-wayvalve, where the one-way valve is configured to permit the passage offormalin into the container lid while at the same time preventing theescape of air and vapors of preserving agent once the syringe has beenremoved from airtight connection with the ingress means of the storagecontainer lid.

The egress means comprise a rubber membrane that is an integral part ofthe container lid. Said rubber membrane features a number of holes. Aplastic disc is a removable part of the receptacle and has an equalnumber of holes that may be brought into alignment with the holes in therubber membrane. When the storage container lid is placed on thereceptacle, the plastic disc is brought to abut and contact the rubbermembrane. Alignment of the holes in the rubber membrane and the plasticdisc may be done by twisting or rotating the storage container lid to afirst locking position. In said first locking position, the storagecontainer lid is air-tightly mated with the receptacle, and formalin maypass from the reservoir that is comprised in the storage container lidto the receptacle to fully cover the tissue samples that are placed insaid receptacle.

When the storage container lid is subsequently twisted to a secondlocking position, airtight mating is maintained while the holes in therubber membrane are twisted out of alignment with the holes in theplastic disc. Furthermore, the plastic disc is fixedly abutted to thestorage container lid and is locked in place resting against—andproviding support to—the rubber membrane. In the second locked position,the rubber membrane and the plastic disc thus co-act to provide anairtight and fluid-tight barrier between the formalin that is held inthe receptacle and the air that is held in the storage container lid.

Such a separation is advantageous, provided that the receptacle issubstantially filled with the preserving agent when the seal isactivated, as it ensures that the tissue samples are covered by thepreserving agent, e.g. formalin, independent of the orientation of thetissue storage container during transport or other handling since thereceptacle will be completely filled.

Yet another advantage with the present system is that the collectingunit, the housing and the tissue storage container may be given uniqueand identical numbers, bar-codes or similar means ofidentification—prominently displayed to improve traceability andminimize the risk that tissue samples from one patient are mistakenlymixed up with tissue samples from another patient.

A further advantage of a tissue storage container of such aconfiguration is that the preserving agent and all vapors of said agentare maintained in airtight enclosures. In some of the envisionedembodiments, such vapors may be kept fully enclosed in the storagecontainer lid until disposal—even after the lid is separated from thereceptacle. Further, if opening of the tissue storage container is onlydone in a pathologist lab or similar facility characterized by theavailability of adequate suction/ventilation and other protectiveequipment, operator exposure should be strongly reduced or entirelyeliminated.

In one particular embodiment, the receptacle comprises a net that mayenclose the collecting unit and is configured to hold the samples inplace in their individual chambers to ensure that they maintain at alltimes their spatial orientation while at the same time permitting thepreserving agent to diffuse into the tissue samples for proper fixation.

In a variant of this embodiment, the net comprises a plastic frame witha threaded section that is configured to mate with locking pins in thelid of the collecting unit.

In one particular variant, the net is removably positioned in the centerof the opening of the receptacle and mating takes place when the storagecontainer lid is twisted to its first position. When the storagecontainer lid is subsequently twisted to its second, locked position,the net is twisted along with the lid, maintaining the connection. Whenthe storage container lid is subsequently removed from the receptacle,the net stays attached to the lid of the collecting unit, ensuring thatthe tissue samples maintain their mutual spatial orientation until thenet is removed by a pathologist or similarly trained individual. Thisfeature is particularly advantageous in the harvesting of tissue samplesin the prostate, where samples are harvested according to specificsystems or methodologies. Since the absence or presence of prostatecancer in specific samples may ultimately determine the choice oftreatment, the preserving the order and spatial orientation of theindividual samples is crucial.

In an alternative embodiment, the lid of the tissue storage container ispre-filled with the preserving agent and the plastic disc is an integralpart of the storage container lid. This permits the elimination of theseparate vessel and provides a, more user-friendly alternative to thesystem described above:

Additional aspects of the invention will be apparent to those ofordinary skill in the art in view of the detailed description of variousembodiments, which is made with reference to the drawings, a briefdescription of which is provided below.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG. 1 is a semi-frontal view of a disposable unit according to anaspect of the present invention.

FIG. 2 is a semi-frontal view of a hand-piece according to an aspect ofthe present invention.

FIG. 3 is a more detailed view of the collecting unit and the collectingunit lid. For clarity, the housing has been removed.

FIG. 4 is an exploded view of the collecting unit with the housingremoved as it is being mated to the lid of a tissue storage container.

FIG. 5 is an upward-looking view of the collecting unit after beingmated to the lid of a tissue storage container.

FIG. 6 shows a simple receptacle of a tissue storage container, thereceptacle being primarily configured to receive larger tissue samplessuch as those produced by an open biopsy.

FIG. 7 shows a receptacle of a tissue storage container, the receptaclebeing more specifically suited to applications with multiple biopsydevices with a net that is configured to enclose the collecting unit ofa tissue collecting device.

FIG. 8 shows a receptacle for a tissue storage container similar to thereceptacles disclosed in FIGS. 6 and 7 , with a plastic lid that is apart of a user-activated seal.

FIG. 9 is an upward-looking view of the collecting unit as it isinserted into the net that is comprised in one particular embodiment ofthe receptacle of the tissue storage container. For clarity, the tissuestorage container with its receptacle is omitted from this figure.

FIG. 10 is an upward-looking view of the collecting unit after beinginserted into and firmly attached to the net described in FIG. 6 .

FIG. 11 shows a tissue storage container lid comprising a luer lock withan operatively connected one-way valve that is configured to receive asyringe. In one embodiment of this invention, the syringe is used toinject formalin into the tissue storage lid, wherefrom it passes intothe receptacle of the tissue storage container to cover the tissuesamples that are housed in the tissue collecting unit.

FIG. 12 shows a tissue storage container lid similar to that of FIG. 11, but with a septum instead of a luer lock.

FIGS. 13-20 show the operating sequence of the transfer of tissuesamples from the temporary storage of a tissue collecting device to themore permanent storage and fixation according to a specific embodimentof the present invention.

FIGS. 21-24 illustrate an embodiment of a tissue storage container, thelid of which itself constitutes a vessel for containing a preservingagent.

DETAILED DESCRIPTION OF THE DRAWINGS

FIGS. 1 and 2 show a multiple biopsy device that is particularly wellsuited to form part of a comprehensive tissue sampling system inaccordance with the invention. The biopsy device comprises a disposableunit with invasive components 1, comprising a cutting cannula 102 and atissue-receiving container 104 that is movably received in an innerlumen of the cutting cannula 102 in response to the motions of a toothedrack that is attached to the proximal end of said tissue-receivingcontainer, the toothed rack being in turn driven by a motor (not shown).

The biopsy device may include embodiments of the device claimed anddescribed in International Patent Application No. PCT/DK2007/000166,which is hereby incorporated by reference.

Operatively coupled to this disposable unit is a hand-piece, shown inFIG. 2 . The hand piece includes a power source, a vacuum unit, amotorized driver unit and a user interface 2 comprising twin buttons anda means for visually inspecting a tissue sample at a suitable point intime. By comprising these and other components, said device provides afully automated tissue harvesting mechanism that is capable ofsequentially harvesting multiple tissue samples and bringing these to apoint outside the body of a patient.

Furthermore, the device comprises an automatic tissue collecting device3 (FIG. 1 ), at least part of which is in operative engagement with thedisposable unit. Said tissue collecting device may comprise a collectingunit 4 (FIG. 3 ) that is stepwise rotatable about a central axis and isdetachably received in a housing 5 (FIG. 1 ).

As shown in FIG. 3 , a lid 6 is attached to the collecting unit and isconfigured to releasably interface with the housing to hold thecollecting unit in place in the housing for the duration of a biopsyprocedure. The lid is furthermore configured to mate with a tissuestorage container lid 7 (FIG. 5 ), according to a tissue transferprocedure from temporary storage to permanent storage, as shown in FIGS.4 and 5 .

FIGS. 6-8 show different receptacles of tissue storage containers forbiopsy samples.

FIG. 6 shows a receptacle of a tissue storage container, the receptaclebeing primarily suited to larger tissue samples that may be placeddirectly in a trough 8, such as those harvested in an open biopsy. Aplastic disc that may form part of a user-activated seal has beenomitted from the drawing for the sake of simplicity. However, it shouldbe understood that such a disc may be needed to provide a gas-tightenclosure at all times. It is envisaged that such a receptacle, coupledto a tissue storage container lid, will provide general surgeons with,for example, an advantageous means of protecting themselves againstexcessive exposure to preserving agents, such as formalin, whilehandling the tissue samples.

FIG. 7 shows a receptacle of a tissue storage container, the receptaclebeing configured to interface with multiple biopsy devices such as theone shown in FIGS. 1 and 2 . The receptacle comprises a net 9 that isremovably suspended centrally over the trough 8 and is configured toreceive and enclose a collecting unit of the biopsy device. Said net maycomprise a supporting frame of plastic or similar material withstructure for releasably mating with the lid of the collecting unit.Such structure may for instance comprise two or more locking groovesthat are formed in the frame and are configured to receive two or morelocking pins that are formed in the collecting unit lid. Such a net isthought to be of particular relevance in the sampling of lesions in theprostate, where the sequence and orientation of tissue samples relativeto their origin in the sampled tissue is crucial. For such applications,it is important to ensure that the tissue samples—or fragments ofthese—do not drift away from the tissue chambers where they wereoriginally placed. The net should therefore be comprised of a very finemesh. FIGS. 9 and 10 show the collecting unit 4 and the net 9 before andafter mating. For the sake of simplicity, the tissue storage containerwith its receptacle is omitted.

In addition to the above, the net 9 may also be used to house aplurality of individual tissue samples, such as those harvested with aconventional core needle or a multiple biopsy device without a tissuecollecting device. Such samples may either be placed directly in thenet, or they may be kept separate. This may, for instance, beaccomplished by providing a het that is or may be divided into smallercompartments. This may be accomplished by inserting suitably configuredpartitions that are supported by the plastic frame, for example.

FIG. 8 shows a receptacle of a tissue storage container, the receptaclebeing similar to the receptacle of FIGS. 6 and 7 , but according to thisvariant, a plastic disc 10 is removably placed over the trough 8 of thereceptacle. Said plastic disc 10 comprises a plurality of holes 16 thatmay be aligned with a similar plurality of holes 17 in a rubber membrane11 to provide a fluid path (FIG. 5 ). The membrane is an integral partof the tissue storage container lid. These two components may becombined to comprise a gas and fluid tight seal between the tissuestorage container lid and the trough 8 of the receptacle. In aparticular embodiment, the combination is accomplished by mating theplastic disc 10 with the tissue storage container lid by means of atleast two essentially rectangular locking bars 12 (FIG. 9 ). The bars 12are formed in the outer periphery of the plastic disc 10 and areconfigured to slide in at least two recesses 13 in the rim of thereceptacle (FIG. 6 ). The length of these recesses determines the freerotating motion that the plastic disc may perform relative to thereceptacle. Said locking bars may be brought in operative engagementwith at least two locking recesses (not shown). Said locking recessesare formed in the rim of the tissue storage container lid as said lid istwisted towards its second locked position. When this is done, theplastic disc 10 is held stationary relative to the twisting motion ofthe tissue storage lid, and the holes 17 in the rubber membrane 11 aretwisted out of alignment with the holes 16 in the plastic disc 10. Inthis position, the rubber membrane 11 and the plastic disc 10 comprise auser-activated seal that is gas- and fluid-tight and may provide abarrier between the tissue storage container lid and the trough 8 of thereceptacle, independent of the shape or size of said receptacle.

FIGS. 11 and 12 show specific ingress means in accordance with specificembodiments of the present invention.

FIG. 11 shows a tissue storage lid that comprises a female luer lock 14in operative connection with a one-way valve (not shown). Said luer lockis configured to receive a syringe containing a preserving agent (e.g.,formalin) and to provide a gas-tight seal for the duration of injectionof the preserving agent, as well as following removal of the syringe.

FIG. 12 shows an alternative embodiment that comprises a rubber septum15 that may be pierced, for instance, by a hypodermic needle that iscoupled to a syringe.

In the following, a particular embodiment of a comprehensive tissuesampling system is used for explanatory purposes, but it is understoodthat the principles and methods disclosed in this invention are notrestricted to usage with this particular system.

When a biopsy is prescribed, the operator may prepare a biopsy device inaccordance with the instructions for use for that particular device. Theexemplary device that is a part of the comprehensive tissue samplingsystem is prepared by removing a protective foil from the transportcontainer of a sterile disposable unit and subsequently removing thedisposable unit from a transport container therefor.

While maintaining sterility, the operator may then insert and couple thesterile disposable unit to a hand-piece. Coupling energizes the device.The operator may then proceed to carry out a desired number of biopsiesin accordance with the instructions for use and the principles ofprocedure that pertain to that particular type of biopsies, as describede.g. in International Patent Application No. PCT/DK2007/000166, which ishereby incorporated by reference.

During a biopsy procedure carried out with the exemplary device, tissuesamples are sequentially harvested and placed in a tissue-receivingcontainer. Said tissue-receiving container is then transported to apoint outside the body of the patient that corresponds with an automatictissue-collecting device.

Said tissue-collecting device is a part of the disposable unit. Itcomprises means for ejecting a plurality of sequentially arriving tissuesample from the tissue-receiving container and of temporarily storingsaid plurality of tissue samples in individual tissue chambers. In oneparticular embodiment, the ejection means comprise a comb-like ejectorframe with a plurality of ejector pins. Said ejector pins aretemporarily insertable through a plurality of holes in thetissue-receiving container, which is capable of reciprocating motionrelative to the tissue-receiving container. The means for temporarilystoring a plurality of tissue samples may comprise a cylindrical,drum-like collecting unit with a number of semi-open tissue chambersdistributed evenly along—and sunk into—its circumference. A plurality oflands and grooves configured to interface with the ejector pins of theejector frame are also distributed along the circumference andperpendicular to an axis of rotation. Said collecting unit is movablyhoused in a housing that is releasably attached to the remainder of thedisposable unit, and is stepwise rotatable about a central axle tosequentially expose each of a plurality of tissue chambers to receive atissue sample. A collecting unit lid is configured to releasably holdthe collecting unit in place in the housing by providing at least onelocking pin releasably received in at least one locking recess in theinner periphery of the housing.

When a tissue sample has been harvested and transported to a pointcorresponding with the automatic tissue-collecting device, said deviceis energized by means comprised in the hand-piece. The ejector frame ismoved from a first lowered position towards a second raised position,through which movement the plurality of ejector pins are brought incontact with the tissue sample that recedes in the tissue-receivingcontainer. Said contact urges the tissue sample out of thetissue-receiving container and into the exposed opening of one of aplurality of semi-open tissue chambers. Subsequent to this, thecollecting unit starts rotating, whereby the lands and grooves of thecollecting unit mesh with the fully raised ejector pins. By suitablyconfiguring the points of interception of the grooves and lands with thetissue chambers, fork-like structures may be obtained that may gentlysupport and lift the tissue sample off the ejector pins as these begintheir motion towards their first lowered position.

The fork-like structure is shown in FIG. 3 . Thus, the tissue-receivingchamber may be emptied without requiring the intervention of anoperator, and the tissue-receiving container may be repositioned in theanatomy of the patient to receive another tissue sample.

By repeating the above procedure a desired number of times, a desirednumber of biopsy samples may be harvested in a single device insertion.

Such and other embodiments of tissue harvesting and collecting systemsare described further in International Patent Application No.PCT/DK2007/000166, which is hereby incorporated by reference.

Subsequent to the harvesting of the desired number of biopsy samples,the device may be removed from the anatomy of the patient. By decouplingthe disposable unit from the hand-piece, access to the tissue-collectingdevice may be obtained. Subsequently, the housing—along with thecollecting unit and the collecting unit lid—may be detached from thedisposable unit, as shown in FIG. 13 .

A significant advantage of the invention is to permit the operator toapply to the tissue samples a volume of a preserving agent such asformalin while at the same time protecting the operator from exposure tosaid preserving agent.

Another advantage is to allow the operator to transfer the tissuesamples from the temporary storage that is provided by thetissue-collecting device to a more permanent storage where fixation ofsamples is possible without having to physically manipulate individualsamples.

In the particular embodiment of the comprehensive tissue samplingsystem, these and other problems are solved by providing a tissuestorage container that comprises an essentially gas-tight enclosure whenclosed and has a lid that may be mated to the collecting unit lid with asnap-lock.

When the operator has detached the housing 5—along with the collectingunit 4 and the collecting unit lid 6—from the disposable unit, he mayattach the storage container lid 7 to the collecting unit lid 6 by meansof twin locking pins that are configured to mate with twin lockingrecesses in the collecting unit lid 6. By twisting the tissue storagecontainer lid in a counterclockwise direction, he may unscrew thecollecting unit lid 6 from the housing 5. The collecting unit 4 alongwith the samples may then be removed from the housing 5, as shown inFIG. 14 . FIG. 15 shows the collecting unit 4 mated to the tissuestorage container lid 7.

Subsequent to removal of the housing 5, the rim of the tissue storagecontainer lid 7 may be placed against the rim of the receptacle of thetissue storage container while the collecting unit 4 is inserted in thecentral hole of a plastic disc 10 that is removably placed over thetrough of the receptacle and is a part of a user-activated seal betweenthe tissue storage container lid and the receptacle, as shown in FIG. 16. The arrow denominated “D1” shows the direction of insertion of thecollecting unit through the hole in the plastic disc 10. Immediatelybehind the plastic disc—and suspended centrally above the trough 8 ofthe receptacle—is placed a net that is configured to receive and enclosethe collecting unit as well as the tissue samples that are held in theirindividual tissue chambers.

To securely join the tissue storage container lid 7 and the receptacle8, the operator may then twist the lid to a first locked position, asshown by the arrow denominated “D2”. In this position, properlyconfigured seals of rubber or a similar material ensure that the tissuestorage container remains a gas-tight enclosure as soon as the tissuestorage container lid has been twisted into said first locking position.

In addition, at least two locking pins in the collecting unit lid 7 arescrewed into a threading in the rim of the net as the tissue storagecontainer lid is twisted into its first locking position, ensuring thatthe net remains attached to the collecting unit to keep the samples inplace in the tissue chambers.

As the tissue storage container lid 7 is twisted to the first lockedposition, a plurality of Niles in the plastic plate is aligned with asimilar plurality of holes in a rubber membrane that comprises anotherpart of a user-activated seal between the tissue storage container lidand the receptacle. Thus, a fluid connection is established between thereservoir in the tissue storage container lid 7 and the receptacle 8.FIG. 17 shows the tissue storage container fully assembled and awaitingthe ingress of the preserving agent.

The first locked position of the tissue storage container lidcorresponds with the ingress stage. Accordingly, the operator may mateor connect a vessel 20 containing a preserving agent to the tissuestorage container lid, as shown in FIG. 18 . The arrow denominated “D3”shows the direction of connection of the vessel 20.

In one particular embodiment, connection is accomplished by screwing asyringe containing formalin onto a female luer lock that is in operativeconnection with a one-way valve, but other means of gas-tight connectionbetween a vessel and an ingress means are also envisioned, such as ahypodermic needle that is inserted in a septum or a hose with a clampthat is pressed onto a spout.

Once a gas-tight connection has been accomplished, the operator mayplace the tissue storage container including the receptacle 8 and thelid 7 on a horizontal surface with the bottom of the receptacle restingon said surface, and inject the contents of the vessel 20 (i.e. syringe)into the reservoir that is comprised in the tissue storage containerlid. Injection is shown in FIG. 19 , with the arrow denominated “D4”showing the direction of motion of the syringe plunger.

The holes that are comprised in the rubber membrane and the plastic discwill permit the preserving agent to run from the reservoir into thereceptacle, while at the same time permitting air from the receptacle toflow into the tissue storage lid.

Following completion of the injection, the operator may remove thesyringe from its gas-tight connection with the tissue storage containerlid. In accordance with the present embodiment, the one-way valveoperatively connected to the female luer lock will prevent the escape ofcompressed air and vapors of preserving agent.

Subsequent to removal of the syringe, the operator may operate theuser-activated seal by twisting the tissue storage container lid to itssecond locked position, as shown in FIG. 20 . The arrow denominated “D5”shows the direction of twisting. During this, the plastic disc is heldstationary by at least two ridges that are formed in the rim of thereceptacle and are brought to rest against at least two locking barsthat are formed in the plastic disc. The rubber membrane, meanwhile,twists along with the tissue storage container lid, which causes theholes in the membrane to rotate out of alignment with the holes in theplastic disc. The combination of the inherent stiffness of the membranematerial and the pressure exerted by the compressed air contained in thereservoir of the tissue storage container lid will ensure that therubber membrane is held against the plastic disc to provide afluid-tight seal, effectively keeping the preserving agent contained inthe receptacle during transport.

While the tissue storage container lid is twisted towards its secondlocked position, the at least two locking bars of the plastic disc slideinto operative engagement with at least two locking recesses formed inthe rim of the tissue storage container lid 7. By suitable configurationof the locking bars and/or the locking recesses (e.g., by forming snaplocks in either one or the other), the plastic disc may be mated to thetissue storage container lid. Since the plastic disc is removably placedover the trough 8 of the receptacle, it will stay attached to the tissuestorage container lid when the lid is removed, pressing at all timesagainst the rubber membrane to maintain the fluid-tight seal.

When the tissue storage container lid has been twisted to its secondclosed position, the tissue storage container along with the tissuesamples may be sent to the pathologist for further analysis.

When the pathologist desires to further evaluate the tissue samples, heshould position the tissue storage container in a fume closet beforeremoving the tissue storage container lid from the receptacle. While thecompressed air and vapors of preserving agent should be gas-tightlycontained within the tissue storage container lid by the user-activatedseal, a little compressed air will most likely be trapped between thesurface of the preserving agent and the seal. Furthermore, somepreserving agent is bound to escape in gaseous form while the receptacleis open.

The pathologist should therefore leave the receptacle in the fume closetwhile removing the net from the collecting unit and samples from thecollecting unit tissue chambers, whereupon he may reseal the receptacleby replacing the tissue storage container lid.

It is understood that such a tissue storage system may also be adaptedto function with other types of biopsy devices than the describedmultiple biopsy device. For instance, the individual tissue cores thatare produced by conventional core needle devices may be placed onmillipore paper, for example, which in turn may be placed either in themain compartment of the receptacle or in the net of the receptacle. Thiswill permit the operator to inject the preserving agent without exposureto the preserving agent.

FIGS. 21-24 illustrate an embodiment of a tissue storage container, thelid of which itself constitutes a vessel for a preserving agent. Asshown in FIG. 21 , the tissue storage container comprises a receptacle80 for receiving the collecting unit 4 attached to a tissue storagecontainer lid 70. The lid contains a volume of a tissue preservingagent, such as formalin. The receptacle is partially covered by a disc81 having a central opening 84 for receiving the collecting unit 4. Thedisc also includes holes 82 for receiving a volume of preserving agentreleased through apertures 72 provided in a lower portion of the lid 70,as described below. The apertures may optionally be closed or sealed.L-shaped projections 74 are provided on a rim portion of the tissuestorage container lid 70. Upon axial displacement of the collecting unit4 into the receptacle 4, the L-shaped projections 74 pass throughinterstices 85 formed in a rim portion 86 of the receptacle 80.Depressions 76 in the L-shaped projections may subsequently engageprotrusions 87 in the rim portion 86 of the receptacle 80, as describedfurther below.

In the state shown in FIG. 22 , the tissue storage container lid 70 hasbeen placed so that its lower rim portion abuts the rim portion 86 ofthe receptacle 80, with the collecting unit 4 placed in a trough of thereceptacle 80. The lid 70 may then be twisted to the position shown inFIG. 23 , i.e. to a first locked position, in which the holes 82 formedin the disc 81 of the receptacle 80 are aligned with the apertures 72formed in the lower portion of the lid 70. As a consequence of twistingof the lid 70 to the position shown in FIG. 23 , seals optionallyclosing the apertures 72 may be broken, e.g. ruptured by suitablerupturing structure provided e.g. on an upper surface of the disc 81.The volume of preserving agent in the lid 70 is then allowed to flowinto the receptacle 80. Preferably, the volume of preserving agent inthe lid 70 is just sufficient to fill the receptacle 80 to entirelycover the tissue sample(s) held by the collecting unit 4.

Finally, the lid 70 is twisted further as shown in FIG. 24 to a secondlocked position, in which the depressions 76 in the L-shaped projections74 are engaged by the projections 87 of the rim portions 86 of thereceptacle 80. In the second locked position, the apertures 72 arerotated beyond the holes 82 and hence fully covered by material of thedisc 81, so that the preserving agent now contained in the vessel 80 isprevented from flowing back into the lid 70.

While this invention is susceptible of embodiment in many differentforms, there is shown in the drawings and will herein be described indetail preferred embodiments of the invention with the understandingthat the present disclosure is to be considered as an exemplification ofthe principles of the invention and is not intended to limit the broadaspect of the invention to the embodiments illustrated.

The invention claimed is:
 1. A tissue handling system, comprising: abiopsy device having a cutting cannula, a housing, and a tissuecollecting device detachably received in the housing, the tissuecollecting device configured to receive at least one tissue sample; anda tissue storage container separate from the biopsy device configured todetachably receive the tissue collecting device after the tissuecollecting device is disengaged from the housing of the biopsy device todeliver the at least one tissue sample from the tissue collecting deviceto the tissue storage container.
 2. The tissue handling system of claim1, wherein the tissue collecting device includes a collecting unit andthe tissue storage container has a trough configured to receive thereinthe collecting unit of the tissue collecting device.
 3. The tissuehandling system of claim 2, wherein the tissue collecting deviceincludes an interface lid connected to the collecting unit, theinterface lid configured to be sequentially connected to each of thebiopsy device and the tissue storage container, the collecting unithaving at least one chamber configured to receive the at least onetissue sample from the biopsy device and configured to deliver the atleast one tissue sample to the tissue storage container.
 4. The tissuehandling system of claim 2, comprising a plastic disc removably placedover the trough, the plastic disc having a central hole, the collectingunit being inserted in the central hole of the plastic disc.
 5. Thetissue handling system of claim 1, wherein the biopsy device comprises adisposable unit, the disposable unit configured for operative engagementwith the tissue collecting device.
 6. The tissue handling system ofclaim 5, wherein the tissue collecting device is rotatably mounted tothe disposable unit for stepwise rotation about a central axis, thetissue collecting device having a plurality of tissue chambers.
 7. Thetissue handling system of claim 6, wherein the tissue storage containeris configured to receive the entire tissue collecting device after thetissue collecting device is disengaged from the disposable unit.
 8. Thetissue handling system of claim 1, comprising a vessel containing apreserving agent for delivery into the tissue storage container.
 9. Thetissue handling system of claim 1, wherein the tissue storage containerincludes a vessel containing a preserving agent and a receptacle inselective fluid communication with the vessel, and wherein thepreserving agent is released from the vessel into the receptacle whenthe tissue collecting device is mounted to the tissue storage container.10. The tissue handling system of claim 1, wherein the tissue storagecontainer has a receptacle, and further comprising a vessel containing apreserving agent, the preserving agent being released into thereceptacle as a consequence of the connecting of the tissue collectingdevice to the tissue storage container.